wincloud

eth 2023-4-5开仓分析

wincloud@newsletter.paragraph.com (wincloud) — Wed, 05 Apr 2023 14:51:30 GMT

eth 2023-4-5 10:14:20交易分析

wincloud@newsletter.paragraph.com (wincloud) — Wed, 05 Apr 2023 02:16:09 GMT

短线交易分析

1888 已经入场了

conda install mamba

wincloud@newsletter.paragraph.com (wincloud) — Tue, 04 Apr 2023 02:30:40 GMT

conda install -c conda-forge mamba

eth 2023-4-3

wincloud@newsletter.paragraph.com (wincloud) — Mon, 03 Apr 2023 15:41:47 GMT

静静等待着两个机会

java Date get real year

wincloud@newsletter.paragraph.com (wincloud) — Mon, 03 Apr 2023 15:41:21 GMT

val date    = Date(2021-1900,3,5)
val instance = Calendar.getInstance()
instance.time = date
println(instance.get(Calendar.YEAR))

kotlin create a map with data init

wincloud@newsletter.paragraph.com (wincloud) — Mon, 03 Apr 2023 15:40:42 GMT

val data = mutableMapOf<String,String>(
    "username" to "王菲",
    "age" to "18"
)

如果这里面还希望加上if else 是否可以呢，可以的

(
    "username" to "王菲",
    "age" to age.toInt(),
    "adult" to if (age.toInt() >= 18) {
        "成年人"
    } else {
        "未成年人"
    }
)
">val age = "18"
val data = mutableMapOf<String, Any>(
    "username" to "王菲",
    "age" to age.toInt(),
    "adult" to if (age.toInt() >= 18) {
        "成年人"
    } else {
        "未成年人"
    }
)

git bash set a proxy

wincloud@newsletter.paragraph.com (wincloud) — Mon, 03 Apr 2023 08:35:50 GMT

git config --global http.proxy http://127.0.0.1:7890

kotlin得到一个对象如果为空则直接抛异常

wincloud@newsletter.paragraph.com (wincloud) — Sat, 01 Apr 2023 03:40:59 GMT

val obj = Any() ?: throw RuntimeException("异常")

当然这里不会满足，Any()这部分一般是我们实际取获取对象的逻辑，实际编写代替即可，我们可以手动改成null测试一下

val obj = null ?: throw RuntimeException("异常")

异常信息展示

kotlin 空不空执行分支

wincloud@newsletter.paragraph.com (wincloud) — Sat, 01 Apr 2023 03:36:38 GMT

null?.let{
    println("非空")
}?:let {
    println("空")
}

?.let 执行的是非空逻辑

?:let执行的是空逻辑

write a simple op class

wincloud@newsletter.paragraph.com (wincloud) — Wed, 29 Mar 2023 07:42:18 GMT

test code

class Op:
    def __init__(self):
        # 自身的数据，占好坑位
        self.df = None
        self.s = ''
        self.i = ''
        self.side = ''

    def accept_data(self, df, side=''):
        """
        用于接收数据
        :param df:
        :param side: 方向 LONG SHORT
        :return:
        """
        self.df = df
        self.side = side
        k = df.iloc[-1]
        self.s = k['s']
        self.i = k['i']

    def verify(self):
        """
        是否验证通过，
        :return:
        """
        return True

    def is_long(self):
        return self.side == 'LONG'

    def is_short(self):
        return self.side == 'short'